Wu Lang, Zhong Kai, Li Zhongwei, Zhou Ming, Hu Hongbin, Wang Congjun, Shi Yusheng
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Hubei Tri-Ring Forging Co., Ltd., Xiangyang 441700, China.
Sensors (Basel). 2021 May 7;21(9):3229. doi: 10.3390/s21093229.
Three-dimensional feature description for a local surface is a core technology in 3D computer vision. Existing descriptors perform poorly in terms of distinctiveness and robustness owing to noise, mesh decimation, clutter, and occlusion in real scenes. In this paper, we propose a 3D local surface descriptor using point-pair transformation feature histograms (PPTFHs) to address these challenges. The generation process of the PPTFH descriptor consists of three steps. First, a simple but efficient strategy is introduced to partition the point-pair sets on the local surface into four subsets. Then, three feature histograms corresponding to each point-pair subset are generated by the point-pair transformation features, which are computed using the proposed Darboux frame. Finally, all the feature histograms of the four subsets are concatenated into a vector to generate the overall PPTFH descriptor. The performance of the PPTFH descriptor is evaluated on several popular benchmark datasets, and the results demonstrate that the PPTFH descriptor achieves superior performance in terms of descriptiveness and robustness compared with state-of-the-art algorithms. The benefits of the PPTFH descriptor for 3D surface matching are demonstrated by the results obtained from five benchmark datasets.
局部曲面的三维特征描述是三维计算机视觉中的一项核心技术。由于真实场景中的噪声、网格简化、杂波和遮挡等因素，现有的描述符在独特性和鲁棒性方面表现不佳。在本文中，我们提出了一种使用点对变换特征直方图（PPTFH）的三维局部曲面描述符来应对这些挑战。PPTFH描述符的生成过程包括三个步骤。首先，引入一种简单但有效的策略，将局部曲面上的点对集划分为四个子集。然后，通过点对变换特征生成与每个点对子集对应的三个特征直方图，这些特征是使用所提出的达布标架计算得到的。最后，将四个子集的所有特征直方图连接成一个向量，以生成整体的PPTFH描述符。在几个流行的基准数据集上对PPTFH描述符的性能进行了评估，结果表明，与现有算法相比，PPTFH描述符在描述性和鲁棒性方面具有卓越的性能。从五个基准数据集获得的结果证明了PPTFH描述符在三维曲面匹配方面的优势。
